We screened over 26,000 adults aged 50-75 years for eligibility and enrolled over 40,000 participants who were randomized to receive either annual low-dose CT screening or chest x-ray screening. Participants were followed for several years to assess outcomes including lung cancer incidence and mortality between the two screening strategies.

1. Peters SP et al. N Engl J Med 2016;375:850-860.
Screening, Randomization, and Follow-up.